Kaguya finally gets to go window shopping and watches vigilantly for her chance to befriend Shirogane’s sister, Kei. While the Fujiwara sisters get in the way, she eventually manages to position herself next to Kei. But then, she can only see Shirogane’s resemblance in Kei’s profile, making her heart beat wildly out of control. Kaguya still decides to take the opportunity to figure out what she should give Shirogane for his birthday when Kei mutters that she isn’t very close to her brother. What secrets will Kei spill about Shirogane?
Studying so constantly that a hole is worn
through one's metal inkstone.
.ادرس بتواصل إلى أن تنخر ثقبًا في حجر حبرك المعدني
Einen eisernen Tuschstein abnutzen,
bis ein Loch entsteht.
Estudiar tanto que se hace 
un agujero en la piedra.
« Étudier au point de briser
un encrier en fer ».
Estudar tanto até furar
a pedra de tinta".
Тот, кто протёр тушечницу
 до дыр от частого письма.